堡镇港南闸原建于一九五七年,防汛抗洪标准低、闸孔小梁底标高低、交通桥狭窄,经过三十多年的运行,闸墩被船只冲撞后严重露筋;海漫块石护坡坍塌损坏,不适应引排航运的需要。经上海市水利局沪水利(92)字第88号文批准进行老闸改建工程。即拆除原闸的同时,保留部份结构的基础上,将原三孔3×6×3米改为单孔12米、闸底 The gate of Beilun Gangnan Gate was originally built in 1957 with low standards of flood control and flood fighting, low and high standards of gate trabecular beacons and narrow traffic bridges. After more than 30 years of operation, the piers have been severely exposed to tendons after being hit by ships. Slope collapsed damaged, not meet the needs of the navigation of the dredging. Approved by Shanghai Water Conservancy Bureau, Shanghai Water Resources (92) No. 88, old sluice reconstruction project. That is to remove the original gate at the same time, to retain part of the structure, based on the original three holes 3 × 6 × 3 meters into a single hole 12 meters, gate